Related Experiment Video
Updated: May 7, 2026
08:34
Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
Published on: June 3, 2016
Alteration of hypothalamic cellular dynamics in obesity
Edward B Lee1, Rexford S Ahima
1Department of Pathology and Laboratory Medicine, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. edward.lee@uphs.upenn.edu
The Journal of Clinical Investigation
|December 29, 2011
Summary
Obesity may stem from hypothalamic injury, causing inflammation and reduced neurogenesis. This brain dysfunction disrupts metabolism, highlighting obesity as a multi-organ disease impacting brain structure and function.
Area of Science:
- Neuroscience
- Metabolic disease research
- Obesity research
Background:
- Rising global obesity rates necessitate new treatment strategies beyond lifestyle modifications.
- Understanding the brain's role in feeding and energy balance is crucial for developing pharmacological obesity treatments.
- The impact of obesity on hypothalamic structure remains poorly understood.
Purpose of the Study:
- To investigate the effects of obesity on hypothalamic neurons and glia.
- To explore how obesity-induced changes in the hypothalamus contribute to metabolic dysfunction.
- To elucidate the relationship between hypothalamic injury and the progression of obesity.
Main Methods:
- Examination of hypothalamic neurons and glia in the context of obesity.
- Analysis of neurogenesis and inflammation markers within the hypothalamus.
- Correlation of structural hypothalamic changes with metabolic parameters.
Main Results:
- Obesity is associated with structural injury to the hypothalamus.
- Hypothalamic injury in obesity leads to inflammation.
- Obesity results in reduced neurogenesis within the hypothalamus.
- Disruption of hypothalamic function contributes to abnormal peripheral metabolism.
Conclusions:
- Obesity is a complex disease affecting multiple organs, including the brain.
- Hypothalamic injury, inflammation, and reduced neurogenesis are key pathological features of obesity.
- Restoring normal brain function may be a therapeutic target for treating obesity and its metabolic complications.
More Related Videos
Related Concept Videos
01:37Hypothalamic-Pituitary Axis
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
01:30Regulation of Food Intake
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
01:24Obesity
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
01:23Cellular Adaptation I: Introduction and Atrophy
Cells can adapt to environmental changes to maintain function and avoid injury, a process called cellular adaptation. Adapted cells exist in a reversible intermediate state with changes in size, number, phenotype, metabolism, or function. These responses help cells meet altered physiological or pathological demands; for example, enlargement of breast and uterine tissues during pregnancy. Early adaptations may enhance function, but persistent stress eventually causes tissue damage.Types of...
01:26Cellular Adaptation II: Hypertrophy
Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy: physiological...
01:24Type II Diabetes II: Pathophysiology
PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.